/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.functor.example.kata.one;

import org.apache.commons.functor.UnaryFunction;
import org.apache.commons.functor.adapter.LeftBoundFunction;

/**
 * @version $Revision: 665786 $ $Date: 2008-06-10 01:17:39 +0800 (星期二, 10 六月 2008) $
 * @author Rodney Waldhoff
 */
public class Multiply extends ArithmeticOperation {

    public Number evaluate(Number left, Number right) {
        return new Integer(left.intValue() * right.intValue());
    }

    public static Multiply instance() {
        return INSTANCE;
    }

    public static UnaryFunction<Number, Number> by(int factor) {
        return LeftBoundFunction.bind(INSTANCE, factor);
    }

    private static Multiply INSTANCE = new Multiply();
}
